MEV Protection

MEV Protection keeps your signed transactions out of the public mempool until they are confirmed on-chain. By routing transactions through private MEV relays, your intent remains hidden from malicious bots - eliminating frontrunning, backrunning, sandwich attacks, and mempool sniping. This delivers cleaner execution, reduced slippage, and significantly more predictable outcomes for on-chain trading activity.

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Ethereum only: eth_sendRawTransaction is now free (0 credits).
Faster execution, no extra cost, no configuration needed.

How to enable Mev Protection?

Supported Networks

MEV Protection is automatically enabled for supported chains:

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If MEV protection is not available, the feature is automatically disabled and standard transaction broadcasting is used.

How MEV Protection Works

Public mempools expose sensitive transaction details like swap direction, slippage limits, and token amounts. MEV bots constantly monitor pending transactions and attempt to exploit them for profit by manipulating transaction ordering.

MEV protection prevents these attacks by routing transactions through private relays instead of the public mempool. Your transaction remains hidden until confirmed in a block.

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No Changes Required

Your existing workflow remains unchanged.

eth_sendRawTransaction continues to work exactly as before. Tatum automatically detects chain capabilities and switches to private propagation when available.

Sending a MEV-Protected Transaction

Use your standard transaction flow:

curl -X POST https://ethereum-mainnet.gateway.tatum.io\
  -H "x-api-key: {YOUR_API_KEY}" \
  -H "Content-Type: application/json" \
  -d '{
        "id": 1,
        "jsonrpc": "2.0",
        "method": "eth_sendRawTransaction",
        "params": ["0xYOUR_SIGNED_TX"]
      }'

Monitoring MEV-Protected Transactions

Use the Tatum Private Mempool Explorer to monitor transaction status before it becomes publicly visible:

Benefits:

• Transaction Safety: Protection against frontrunning, backrunning, sandwich attacks, and mempool sniping.
• Reduced Slippage & Failed Swaps: Cleaner execution and fewer wasted gas fees.
• Faster Block Inclusion - direct propagation to block builders:
  • 50–400 ms faster propagation
  • 400–1000 ms faster block inclusion
  • Up to 2 seconds faster during network congestion
• Full Transparency: Private until confirmed, then fully verifiable.
• Zero Configuration: No SDK changes, no routing logic, works automatically.

FAQs – MEV Protection